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TonEBP and SMIT expression in human placenta.

Jung-A Shin1, Hyug-Moo Kwon, Ki-Hwan Han

  • 1Department of Anatomy, Ewha Womans University School of Medicine, Seoul, Korea.

Anatomy & Cell Biology
|October 25, 2012
PubMed
Summary
This summary is machine-generated.

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Tonicity-responsive enhancer binding protein (TonEBP) is found in human placenta cells. This transcription factor is key for regulating sodium-myo-inositol cotransporter (SMIT) gene expression, potentially aiding inositol transport to the fetus.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Physiology

Background:

  • Tonicity-responsive enhancer binding protein (TonEBP) is a transcription factor regulating transporters like SMIT and aldose reductase.
  • TonEBP controls intracellular osmolytes and has immunomodulatory functions.
  • TonEBP is known to be abundant in the placenta, but its specific location and function there remain unclear.

Purpose of the Study:

  • To investigate the precise localization of TonEBP within the human placenta.
  • To elucidate the functional role of TonEBP in placental transport mechanisms.

Main Methods:

  • Immunohistochemistry was used to detect TonEBP protein in normal human full-term placenta.
  • In situ hybridization was performed to analyze SMIT gene expression.
Keywords:
Human placentaNFAT5Sodium-myo-inositol cotransporterTonEBP

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  • Comparisons were made with TonEBP knockout mouse placentas.

    • Main Results:

    • TonEBP was localized in villous trophoblasts, extravillous trophoblasts, and some endothelial cells of the human placenta.
    • SMIT expression patterns mirrored TonEBP localization.
    • Both TonEBP and SMIT were absent in TonEBP knockout mouse placentas.

    Conclusions:

    • TonEBP is a critical regulator of SMIT transcription in the placenta.
    • TonEBP likely plays a significant role in placental inositol transport to the fetus.